Ball mill



May 15, 1923.

L. L., SWEET ET AL BALL MILL 2 Sheets-Sheet 1 Filed Dec.

To all whom it may concern.-

Patented 'May 15, 1923.

v UNITED STATES LEWIS 11. swEErAnn M KE. MORLEY, or tvALnAo JnnHo.

n BALL Minn Application filed' December 7,1922. :S eria1No'.605;,51 9. v

' Be it known that we, LEWIS 'L. SWEET and I MIKE MORLEY, oitizenslof the United States,

residing at Wallace,in the city of Shoshone and State of Idaho, have invented new and useful Improvements in Ball Mills, of which the following is a specificationi This invention"relates to. apparatus for grinding'ore and other material, 'and'more particularly to grinding mills oftheball and drum type. 3 I V It is the object "of the present invention to provide a 'grinding mill of the kind stated embodying certain novel and improved features of construction and modes of operation to be hereinafter'described and claimed, and inorder that the same may be better understood, reference is had to the accompanying drawings, wherein, Figure 1 is an elevation of the mill;

Fig. 2 is a vertical section on the line 22 of Fig. 1;

Fig. 3 is a central longitudinal section,

and

Fig. 4 is an elevation of a liner plate. Referring specifically to the drawings, the rotary drum is composed of two end sections or heads 5, connected on the inside by an annular series of liner plates 6, which latter therefore form the side of the drum. To the heads are also connected, on the outside thereof, cylindrical plates 7 which extend inwardly toward each other, but only partly across the drum, so that they are spaced at their inner ends, and there is left in the side and intermediate the ends of the drum, an opening 8 which is spanned by the plates 6 and extends completely around the drum circumferentially to form an outlet for the ground or crushed material. To the inner edges of the plates 7 are secured angle irons 9. The liner plates 6 are provided with perforations or apertures 10 to permit passage of the crushed material'to the side outlet 8 of the drum. The drum heads 5 have hollow trunnions 11 through which thematerial to be round is fed into the drum.

' IIefe-rrin to Fig. 2 it will be noted that the liner pFates 6 are assembled and secured in overlapping relation at their adjacent ends. By means of bolts 12 passing through the overlapping ends of the liner plates and through the drum ends 5, the latter are rigidly connected. The bolts 12 also pass through the plates 7 for securing the same to the drum ends. Adjacent plates 6 are, also bolted together intermediate their ends, as

shown at-13; 1 The overlapping arrangement of the-plates'6 producesa'i steppedsurface in the interior of the drum, the steps or shoulders running in the direction'ofl-the length ofthe'drump This arrangerjnent'of theplates'materiallyassists the grinding action;

1 Intermediate its ends, at the site'fofl the outlet 8, the-drumis 'surrounded' by a stationary cylindricalcasing 14: having angle irons 15 secured "to its ends. At the bottom,

this'casing' has a. discharge'opening- 16, and

beneath the latter is'locat'ed a tankl'? into which the crushed material is discharged.

Th casing 14 is provided with suitable su ports 18, and the drum is eccentrically lo-.

cated in thecasing-so that the drumiis closest to the casingat the topthereof, as shown in Fig: 2;

In operation, the material .to befground v or crushedfis fed into the drum through the hollow trunnions 11 at the ends thereof.

The crushed particles pass through the perforations 10 in the liner plates 6 and through the side opening 8 of the drum into the housing 14, which latterv guides them to'the.

opening 16 for discharge into the tank or other receptacle 17 Theangle irons 9 and 15 form out and in-turned guard flanges to prevent splashing of-water and the escape of material from the partly open ends of the housing 14;, Any suitable means for rotating the drum may be provided, and as they are immaterial tothe invention they have not been illustrated. For the same reason, the balls or similar been shown; a

The mill is strong and durable, simple in grinding elements have not construction, and highly efficient in operation. y

We claun:

1. In a ball-mill, 'a drum, perforatedliner i plates inthe drum, said drum havinga sideoutlet extending completely around the same and spanned by the liner plates, and a housing enclosing the drum at the site of the outi let and having a discharge opening. I

2. In a bal l-mill, a .drumcomprising end;

sections and liner plates connecting the same in longitudinally spaced relation,'the-plates spanning the space between the end sections and having perforations, said space being the drum outlet, and a housing enclosing the drum at the outlet and having a discharge opening. I

In a :ballanill, a drum comprising end sections andlin'er plates connecting the same in longitudinally spaced relation on the inside thereof, said plates spanning the space betweenthe end sections and having perforations, cylindricalplates connected to the outside of the end sections and extending in Wardly therefron1,saicl cylindrical plateslpeing spaced from each other at their inner ends, an Ia h u ng I enclos ng he al i m at the site of the space between the inner lends of the: y indric lp a s, nd ha ing enmitlet. v I

- 4: 1:1112 a Lm a dr m c mp is g end se tion an l n pl nec ing the sam in l ngit din ly pac d rel ion 0.1.1 the-i111 side thereof, said plates spanning thev space Y be e -t e 'se ions nd having p r oratio'ns,'cy;l;indrica l plates connected to the ontsideof the lend sections and extending inwardly' therefrom, said cylindrical plates behou ing h i g mt rn d fl ges- V .5, A ball-mill druin having aside outlet extending completely around the same, and perforated liner plates spanning said outlet.

6. A ball-mill drum comprising end -sec- 7. A ball-mill drum comprising end sec-r tions and liner plates connecting the'sarne' in longitudinally sp aced relation on the inside thereof, said plates spanning the space be-. tween the end sections and havingperforations, and -,cyl'indrical plates connected to the outside !of the end sections-andextending in.-

erdlytj e e nin, said cyl nd ica plt 'be ins p ed m each other the n r en I t on li r plates m t ng th same in l ngi udinally r ds a e 0 2 he inside thereof, said plates spanning the spaee'he tWeen the end sections andhay ingperforas tions, and cylindrical plates connected to the Outsi e oi h ends c ic sen e nding inwardly therefrom, said cylindrical 'plates being s-pacedfixon each other at their-inner S. A ballmill lcomprisingiend" ends and having out-turned guard flanges thereat. I i g v In testimony whereof We effix ,on-r signa+ tures. I

, LEWIS L. SWEET,

MIKE MORLEY. 

